0
votes
2answers
118 views

Is there a way to optimize this 2D lighting effect shader? [duplicate]

I'm doing a little 2D game in C++ with Direct3D 11. In the game I want to render a sort of shadow that covers part of the screen: To do this I am using this pixel shader: float4 PS_Main( PS_Input ...
2
votes
2answers
172 views

How can I remove branches from a fragment shader function?

I have a fragment shader, when I've carefully managed to remove most branching decisions, as I have found out through research here that they are bad. But I have one function that I just can't work ...
7
votes
1answer
387 views

GL ES: Fragment shader optimization

Summary: I get FPS slowdown as soon as I try to tint the sprites (i.e: multiply texture with color in the fragment shader) Details: Hardware: iPod touch 4 I am drawing 700 sprites on the screen ...
6
votes
1answer
256 views

How do texture lookups for trig functions work?

I have a pixel shader that calculates a mandelbrot fractal. It uses the standard formula: z = z2 + c I'd like to extend it so the power z is raised by varies. To do this i have the following ...